Calculating-machine.



H. S. BOOTH.

CALCULATING MACHINE.

APPLICATION. 111.21) my, 2. 1912.

Patented M51130, 1915 8 SHEETS-SHEET11 INVENTOR fi fiooz fi WITNESSES H. S. BOOTH.

CALCULATING MACHINE.

APPLICATION FILED MAY 2.1912.

1,1 33,917. Patented Mar.30,1915.

.8 SHEETS-SHEET 2.

9 1 'V NESSES. INVENTOR. IT Jen 5300290 H. S. BOOTH.

CALCULATING MACHINE.

APPLICATION rum) MAY 2,1912.

1,133,917. Y Patented Mar. 30, 1915.

B SHEETS-SHEET 3.

INVENTORC WITNESSES z z Li oazz W H., S. BOOTH.

CALCULATING MACHINE.

APELIOATIQH. ITILED MAY 2. 1912.

1,133,917. Patented Mar.30,1915

8 SHEETSSHEBT 4.

WITNESSES. INVENTOR.

\ r d mgoo /o M 6 H. S. BOOTH.

CALCULATING MACHINE.

APPLICATION mum MAY 2, 1912.

Patented Mar. 30, 1915.

8 SHEETS-SHEET 5.

H. S. BOOTH.

CALCULATING MACHINE.

APPLICATION FILED mu 2. 1912 r 1,133,917, Patented Mar. 30; 1915 8 SHEETS-SHEET 8.

INVENTOR 7fiszyx5 B0 03% ZV%W///WA? WITNESSES H.. S. BOOTH. CALCULATING MACHINE.

APPLICATION FILED mu 2, 1912.

Patented Mar. 30, 1915.

INVENTOR /flm Q WITNESSES.

H. S; BOOTH.

CALCULATING MACHINE.

APPLICATION FILED MAY 2,1912.

. 1,133,917 Patented Mar.30, 1915.

8 SHEBTSSHEET 8.

INVENTOR WITNESSES. jienfiy/j'zoo 670 HENRY SHEPLEY BOOTH,

Specificationof Letterslatent.

or MANCHESTER, ENGLAND.

' CALCULATING-MACHINE.

. Patent-ed Mar. 30, 1915.

Application filed May 2,1912. Serial No. 694,741?

To all whom it may concern:

Be it knowI that I, 'Boor'n, a "British .subject,'.' residing at "Manchester, county of Lancaster, England, have invented certain new and useful Improvements in Calculating-Machines, of which the following is a specification.

This invention relates to calculating mechanism which may be used in con1unetion with or applied to most of the well known makes of type writing machines or may be constructed separately merely for calculating purposes; 7

The invention comprises improved construction and-arrangement of parts for operating .the calculating "wheels either for addition oi-subti'action; for connecting the numeral keys and type levers therewith and for controlling and operating thetotalizing mechanism. 5'

The invention will be fully described with reference to the accompanying drawings in which as an example it is shown as apphe to one construction of type writing machine.

F igure 1. is a side elevation partly insection. Fig. 1."is a detail view of a modified form of cam plate. Fig. 2. is a front eleva tion partly in section with the key board removed. Fig. 3. is a plan of carriage C and parts relating thereto. Fig. 4. is a plan view of the cam plates and the roller levers. is a detail view showing the air-- Fig. t". rangement of the roller levers. Fig. 5. IS a plan view of the numeral keys and connections. Fig. 6. is a side elevation of the lockinggear. Fig. 7. shows details of the roller levers for numeral keys l and 10. Figs. 8 and 9. are detail views showing a sector which is employed and the pawl and ratchet wheels associated therewith. Fig. 10. is a plan of the lever for operating same. Fig. ll. is a side elevation of the-carriage. Fig. 12. is a plan of a stop and bar which are employed. "Fig. 13. is an enlarged front elevation of the totalizer. Fig. 14 is a section of same showing the pence wheels. Fig. -15.is a'jsection pf same showing the ten shillings wheels-from the opposite side. Fig. 16 is a frontfelevationshowingdouble total: izers. V

. The type of. anybrdinary type or pattern, one such machine of known construction being shown with numeral keys K and type bars U which are connected to my improved calculating HENRY SHErLEY n maybe connected type writing machine in a similar manner is writing machine is constructed apparatus by levers k and connecting rods or links The calculating apparatus which to the keys of any class of constructed with anumber of cam-plates C'0ne for each numeral key Kcar-f a shaft S extending across the machine. A

corresponding number of roller-carrying levers A ure mounted on a .and with .these sector shaft 9', roller levers A the min plates C engage. On the end of the sector shaft S a toothed sector T oscillated by any one of the numeral keys K through the cam platcs'(" and roller levers A The roller. levers are set at different angles upon the shaft (see Figs. 4 and 4) so that-whileIth: cam plate C' of the numeral key9 will atonce. engage and operate its roller lever, giving il. a longer movement, the cam plate (7 of the muneral key '2 or 1 will travelsonie distanrr before engaging its; roller lever A., giving it a much shorter movement, the intermediate roller levers receiving a movement corresponding to the numeral key connected therewith. Instead of setting the roller .levers A in this way the length of the cam plates C may vary in length (see Fig. 1*.) and the roller levers be all set square or parallel on the shaft S. or the roller levers A may vary in length according to the numeral key K with which they are connected, the lever being longer for the numeral key of higher denomination. All these arran emcnts give the same result that the shaft Q and sector T will be rotated a greater degree when a numeral key K of higher denomination is operated than when a-key of lower denomination is operated. 1

The cam plates C are each of similar shape, with concentric surfaces C and C connected by a cam or crank surface C. which latter engages its corresponding lever A when depressed. Each cam plate is connected to its key K by an upright rml R, a lever K and a link K the.rod R being fitted with a cross pin 1" engaging in a slot in the cam plate and formed with a hook R at its upper end. At opposite sides of each cam plate C guide plates (7 mounted on the cam shaft S are placed, and these guide plates hold the connecting rods It at the back of the slots against the pressure of swings c which tend to mo' esaid rods in the opposite direction and when the is fixed which is ied by guide plates are withdrawn, allow the hooked ends R of the rods to engage hooked stops or catches C of suitable shape to lock the said rods R and prevent their downward movement. The guide plates C rest on a transverse bar or shaft B carried by guide arms A. \Vhen anyone of the cam plates C is depressed it'carries with it all the guide plates C which are depressed at the same time thereby locking all the other keys, connecting rods and their cam plates in their upright position. The top corners of the guide plates Care rounded to set back all the connecting rod hooks R clear of .the stops on the return of the key. An additional arm A on the cam shaft S is connected by rods or links In with the spacing bar K of the type writer, to permit of the movement of the platen and of the carriage C without any of the numeral keys K being operated. The shaft .8 is free to rotate without moving the'arm A but the movement of the arm A. rotates the shaft S, owing 'to said arm beingprovided with a stop or abutment a which engages a projection s on the shaft S.

The carriage C is mounted to travel to and fro across the machine on a shaft S which is preferably rectangular and on a secondary or guide shaft S. On the end of the carriage shaft S a wheel W is mounted, which wheel is engaged by the toothed sector T by which the shaft S is rotated.

The wheel W is loose on the end of the shaft S and to it is attached an arm carry-- ing a pawl P which engages with a ratchet wheel W affixed to the'shaft. This allows the wheel W to rotate freely in one direc 'tion, but rotates the shaft when moved in the opposite direction. The pawl P rotates the shaft S '0n the return stroke of the sector T. This is effected by a coil spring p fitted within the wheel \V which is wound up on the forward rotation of the sector T and rotates the wheel \V in the reverse direction on the return stroke of the sector. This arrangement of spring prevents any back lash between the teeth of-the wheel W and the sector T and brings the pawl P uniformly to a position governed by the roller lever A resting against the curved surface C of the cam plate C, thereby preventing any .wrong engagement of the pawl P with the ratchet wheel The carriage has fitted within it two wheels W 3 on the shaft S and two wheels W loose on a secondary or guide shaft S. One of the wheels on the shaft S gears direct with the counting or totalizing mechanism, and the other wheel TV gears with one wheel \V on the shaft- S, the other wheel W on the shaft S being connected thereto and gearing with the wheel V of the counting or totalizing mechanism when the latter is moved out of gear with the first wheel W These wheels are so placedthat by slightly altering the position of the totalizing mechanism in relation thereto either one can be brought into mesh therewith. As these wheels are geared together, they rotate in reverse directions so that one is employed for addition and the other for subtraction.

The carriage C is connected by a cord cl passing over a suitable differential drum D with the papercarriage of the machine,

the differential drum D giving the correct movement equal-to the spaces of the total-' 'A to which the carriage C is connected by the cord (1, and the carriage C is hauled across the rack R. The sliding projection A is fixed to slides S and is carried on a bar S which is thrown into the path of the -projection P through the levels X and X each time the numeral shift key is depressed and locked. The depending lever X- is formed with a cam orbent arm which, on the raising of the carriage by the depression of the numeral shift key, engages ahandle Y, causing the levers X and X to move a pivoted lever Z connected to the carriage reease lever Z which throws the paper carriage rack out of gear'and puts the carriage C under the influence of the rack R. The release of the pawl P of the calculator carriage C is effected by an attachment R to the locking mechanism (see Fig. 6).

The wheels \V and W carried by the carriage and rotated by the sector T are, as the carriage traverses the shaft S brought successively into mesh with the wheels of the totalizing mechanism. The wheels \V gear with the-wheels V and on drums attached to the wheels \V the numbers indicated by the machine are shown through a slot. The wheels gear with the wheels \V, and the carry over is effected by a projection a on the wheel \Vengaging with a pin or tooth on the next wheel W of higher value, which moves the latter rather more than the space of a tooth every time 9 moves to 0 on the indicator drum attached to the wheel \V. The totalizer wheels V are set back to true alinement by a locking gear which leaves the projection on the first wheel clear of the pins or teeth on the sucone or other of the setting wheels and W of the carriage C. This movement is about the distance of one-third of a tooth on the auxiliary rack. In normal position the wheels arerotated in one direction for addition, and when-moved by the cam C tothe other position ar'erotated inthe reverse direction for subtraction. For subtraction the carry over will opera te in the reverse way and subtract 1 from the next higher indicator drum every time an indicator drum is turned from 0 to 9. A fixed tooth (not shown) maybe fitted to the frame with which .the teeth of the wheels N and \V on the calculator carriage C engage when crossing the space between L and S and S and D,to prevent the wheels VV and W being displaced when moving from one set of totalizer wheels to the next.

The various parts of the mechanism are locked by suitable devices, and released when desired to'preventone key being depressed before another mal position, to prevent movement of the totalizer wheels and to prevent movement of the calculator carriage when not v in operative' position (see Figs. 1, 2, 6 and 14:).

A locking pawl L which engages with the teeth of totalizer gvheels W of each value and denomination, is'carried on a suitable shaft S and on shaft S is mounted a locking lever, A with which a second locking lever L engages. An arm or lever A on the cam shaft S, which is moved by the depression of the key K, is connected by connecting rod R and bell crank lever B to connecting rod R and parallel arm A The depression of the key operates these levers and draws down the connecting-rod R which latter has two pins 1", and 1", thereby moving the second lockinglever L out of the path of the first locking lever A and allowing the locking paw s L to be lifted by a spring away from the teeth of the totalizer wheels.

A separate locking gear 13 providedfor' the carry over wheels of the totalizer, and this gear preferably embodies pawls L which are fitted between each pair of wheels TV and are provided each with a lock pin w that is normally placed between two of the pins of the teeth of each wheel l' such arrangement permittings'aid wheel to move something less than half the space of a tooth in either direction. ing wheel, a pin w is provided which engages with a double cam '01 wedge on the end;of pawl L. WVhen the carry over oper- 4 chine will remain locked by has been returned to its nor- On the adjoinates in either direction, the pin w raises the-locking pawl L and with it the lock pin w, to allow the wheel affected by the carry over to move one tooth only, after which the wheel is relocked by said pin (see Fi 14). To release the wheels to be operated on the return stroke of the sector T, a releasing arm A with a double cam surface (or face inclined in two directions), see Fig. 3, and curved to avoid the locking arm shaft S is mounted upon the calculator carriage which, on the wheels V and W being set in engagement with any of the totalizer wheels, presses against the bottom arm of the locking pawl L and raises the latter .out of contact with the pins. The releasing arm A controls the locking pawl L" whether the totalizer is set to add -or subtract. I

To prevent the ratchet wheel W over running its starting position, a. stop arm A mounted upon a stud S engages a pawl P and locks it against a ratchet tooth, thus preventing further rotation, see Fig. 8. If any key be insufiiciently depressed, the Ina-V reason of the releasing pin r not having been moved suflicicntlyto reach and move the locking lever L. A second ratchet wheel \V is fitted alongside the ratchet wheel 7 on the car- "riage shaft S and is connected therewith by a pin projecting into a short slot in the latter, the teeth of both wheels being kept normall y in line by a spring. The second ratchet is fitted with laterally projecting pins, one for eachtooth. The pawl P, which engages and rotates the ratchet carries on one side a cam which rides over the teeth of the second ratchet Vi A key lever L" with a projecting arm A is pivoted at the end of the machine adjacentto the ratchet wheels, with the arm A below and clear of the pins projecting from the second ratchet By depressing this lever, the arm A" is lifted to engage one of the pins on the second ratchet wheel thereby moving that ratchet half a tooth backward or in the reverse direction to that in which the ratchets are moved by the pawl P. This movement of arm A is transmitted to pawlpleted its return to normal position against its stop t. To the end of the sector shaft S a lever L is afiixed, by which the sector shaft can be rotated to move all the roller levers A? thereon out of the path of their respective cams C, thereby leaving the machine free to be used for ordinary type writing without calculating. The stopcatches C", with which the hooks R of the rods R of the numeral keys K engage; are, withthe exception of the catch 0 of thekey K for the numeral 1, fixed to the shafts? so that; all move together, and this batch C.. of the numeral l-is loose thereon so as to re-'- main stationary, while theother s, are moved to and fronrtheir respective 'hen the carriage cfpassesfinto th' space for tens of shillings, a projectioniP thereon engages with the arm A and moves all the catches 0 corresponding to the fun-- meral keys 2 to 0 into the path of the hooked key rods R", therebyj'locking all the keys, except that for the numeral. 1. The indisf li cating drum on the wheel-ll"? then in gear has five projecting-'pointsfa' 'and'theadjacent wheel W has five pins 4: f orthe purto protect by Letters pose of carrying on from terisof to V units of pounds. After-thefcarriage 3 arm A the catches C? are 're-set'or return to normal by their own weight' or by a'f spring (not shown), (see Fig. l4).--;;When[f the carriage C passes into the pencespace the project-ion P thereon engages-'1 an arm A 'similar to arm A" on the shaft S, and again locks all the keys exce'pt numeral- 1. F or pence, an eccentric bearing S"-is fitted to the shaft S, and agtwelve toothed wheel W" mounted thereo The"corre-' sponding indicator drum' shows otojlL' The spaces are slightly, smaller than-the decimal" spaces and are also slightly-pro jected forward. One wheel gears with-that on the left of the drum and the carry-ovem takes place between ll0-a nd 0 11. The two locking pawls L, and L" operate as before. See Fig. ll. .The wheel to the left of the drum is fitted with ten pinsor teeth, and the projection on the periphery of the adjacent wheel adjusted to suit. The wheel W which gears with the setting wheels, carries a second wheel fixed to the same boss so that they rotate together, the second wheel gearing with and driving the wheel The roller A ogerated by the numeral key 1 is loose on a boss and is normally held by a spring in position to add 10. \Yhen moved by its cam, it engages with a projection' on the boss at a point from which it will move the sector through the space necessary to add 1. 'hen, the carriage moves into the first pence space another projection l? thereon moves a swingin' lever I. and by means of a connecting rod. looseclutch member C" on the sector shaft 5 (Fig. Tl. The movement of the loose clutch member C places it in contact with a projection on the boss of the lever A and therefore, when the key is operated it will print 1 and add 10. On passing into ployedto printthetotafl of. the first totalizer" the,'nnmera'l I p which the carr1age"travels' tojan-i' fro, a

the second pence space, the swinging lever L and clutch'are released.- r In a machine fitted with twototalizers (see Fig. 16) aflsecond setting-wheel RV actuated by the rotation of the shaft S- is fitted in an extension 'of the carriage and arranged to engage with thewheelsof, the first totalizer, when the. setting wheel 'i is in engagement' with" the correspending range of ,wheels ink the second totali2er.-"Ifthef wheelsof the second car- 1 ria'g engage thmwlieels of the ifirst totalizer togubt'ract, "arid the second totalizeris emin 't he second niouev 'column,the first total 80 -izer will be ret'urnedito zero, thereby prov-- ingthe correctness ofthe transfer, and at'f' the same tim ;will be cleared rea'dy for the next ent \Vha't r ,'.T.. i. claim as n invention and desire t'ij su ge ec ee t e m i tron, with-numeral keys,fl olf a traversing car ge' wrth double sett'm'g' whels, mounte thereon? to.-wh1ch; wheelsgthe-imovement of keys.- isimpa'rtedi a' saaft on totaliz'er with-rwhlchthe wheels on the car-' riage are operatively engaged, means-for moving said totalizer laterally in one direc- I tion'to engage one setting wheel, and means separate =;fr0m the last-named me; 15 for moving said totalizer laterally in the opposite,directiOn -toengage-the other setting wheel, whereby thegsamemovement. of the numeral keys and'th'eir operative connections-'ma'y be emplo'yed for addition or subtraction accordin to the position of the totalizer, substantially. as. described.

2. In a calculating machine, the combination," with a plurality of numeral keys, of a series of cam plates connecting with correof roller ft where spending numeral keys, :1 serz levers one for each cam plate, a s

on said levers are mounted, a sector mounted on said shaft, :1 shafthaving gear connections with said sector, a carriage traversing the second named shaft and having wheels rotated thereby, and a totalizer with which the wheels oft'ne carriage operatirely engage,substantially as described.

In a calculating machine, the combination, with the numeral keys, of a series of cam plates having hooked rods thereon, side r plates to operate such hooked rods, 'and dc: pending hook catches with which the hooked rods engage to lock-all the numeral keys but the one depressed, substantially as described.

I. In a calculating machine, the combination. withnumeral 'keys and a traversing carriage. of a pence'totalizer constructed with a twelvc-tooth'wheel, an eccentric adjacent thereto on which the wheel is mounted, and a ten tooth wheel with which the first-named wheel gearsand causes a carry over for one complete revolution of said first named wheel.

5. In a calculating machine, the combination, with the platen, the numeral keys, the carriage and the totalizer, of an auxiliary rack for controlling the relative movements of the carriage and the platen, substantially as described.

,6. In a calculating machine, the combination, with the platen and the numeral keys, of a traversing carriagecarrying operating wheels, an auxiliary rack to control the movement of the carriage, a pawl on thecarriage to engage the rack, means for lifting the pawl when a key is depressed, and other means connecting the-carriage with the platen, substantially as described.

7. In a calculating machine, the combination, with a traversing carriage, a totalizer and gearing between the carriage and the totalizer; of a shaft; gearing between said shaft and the first-named gearing; an arm loose on said shaft for actuating the latter when coupled thereto, to print 1 and add 10 for tens of pence; a clutch member actuated by the movement of said carriage for coupling said arm to said shaft; and means for actuating said arm.

8. In a calculating machine, the combination, with a carriage, a shaft whereon the same is arranged to travel, the wheels mounted in said carriage and rotated by said shaft; of a totalizer having wheels operatively engaged by the first-named Wheels; a shaft having gear connections with the carriage shaft; an arm loose on the secondnamed shaft for actuating the latter when coupled thereto, to print 1 and add 10 for tens of pence; a clutch member onsaid second-named shaft actuated by the movement of said carriage for coupling said arm to said shaft; and means for actuating said arm.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses. Y

HENRY SHEPLEY BOOTH. 

